Abstract
Tins paper presents the comparison of signal quality and efficiency performance between simulation and experiment for a linear RF transmitter based on a hybrid quadrature polar modulation (HQPM) architecture with digital predistortion scheme. Adjacent channel power ratio (ACPR) with and without applying the baseband predistorter are both shown to demonstrate improvement in transmitter linearity. The simulated and experimental results have validated the key feature of the proposed HQPM transmitter architecture that its superior power-added efficiency (PAE) is less sensitive to the output power level in comparison with other linear transmitter architectures.
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